mineral
Iron-stained jasper (likely rough jasper)
Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored by iron oxides
AI-generated identification · may be incorrectOpaque ochre-orange to brown, dull to slightly waxy surface, with subtle dark markings; quartz has Mohs hardness 7 and trigonal crystal structure, though jasper shows no visible crystals or cleavage. The wet appearance and surrounding objects make precise identification uncertain.
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Physical properties
Opaque ochre-orange to brown, dull to slightly waxy surface, with subtle dark markings; quartz has Mohs hardness 7 and trigonal crystal structure, though jasper shows no visible crystals or cleavage. The wet appearance and surrounding objects make precise identification uncertain.
Formation & geological history
Forms when silica-rich fluids or sediments become silicified, with iron oxides producing the coloration; deposits occur in many ages and settings worldwide.
Uses & applications
Used as an ornamental and lapidary stone for cabochons, beads, carvings, and polished specimens; this piece appears rough and unpolished.
Geological facts
Jasper is a chalcedony-rich rock, rather than a single distinct mineral species, and its colors commonly reflect iron-bearing impurities.
Field identification & locations
Look for opaque, fine-grained material that scratches glass and lacks cleavage; common sources include Brazil, India, Australia, and the western United States. A small rough fragment typically sells for about $1–$15, depending on pattern and quality.
